$(function(){
 //get element
 let $btn = $('input'),
     delay =  6,
     timer = null;

 //init status disable,text,delay
 $btn.val('同意(' + delay + 's)');
 $btn.attr('disabled','disabled')
 //start timer,timeout button enable
  timer = setInterval(()=>{
    //delay > 0
    //set btn text
    //delay --
    //delay = 0 set btn enable
    $btn.val('同意(' + --delay + 's)');
    if(delay === 0){
      clearInterval(timer);
      $btn.val('同意');
      $btn.removeAttr('disabled');
    }
  },1000)
 //click event
  $btn.click(()=>{
    alert('button click');
  })

});
